1 files changed, 29 insertions, 0 deletions
diff --git a/sys/amd64/include/stack.h b/sys/amd64/include/stack.h
new file mode 100644
index 000000000000..848f35aad1a1
--- /dev/null
+++ b/sys/amd64/include/stack.h
@@ -0,0 +1,29 @@
+/*
+ * This file is in the public domain.
+ */
+
+#ifndef _MACHINE_STACK_H_
+#define	_MACHINE_STACK_H_
+
+#include <x86/stack.h>
+
+#ifdef _SYS_PROC_H_
+
+/* Get the current kernel thread stack usage. */
+#define GET_STACK_USAGE(total, used) do {				\
+	struct thread	*td = curthread;				\
+	(total) = td->td_kstack_pages * PAGE_SIZE;			\
+	(used) = (char *)td->td_kstack +				\
+	    td->td_kstack_pages * PAGE_SIZE -				\
+	    (char *)&td;						\
+} while (0)
+
+static __inline bool
+kstack_contains(struct thread *td, vm_offset_t va, size_t len)
+{
+	return (va >= td->td_kstack && va + len >= va &&
+	    va + len <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE);
+}
+#endif	/* _SYS_PROC_H_ */
+
+#endif